hx35 vs he341

The 341 should spool quicker as the exhaust housing is 9 cm. The HX35 should be a 12 cm. I think its (HE341) rated for more CFM as well. I'm not sure if that's a big issue on gas engines. In the Diesel world the He341 is not liked to much as the small exhaust housing can lead to High EGT's.